rubenada commented on a change in pull request #1112: [CALCITE-2930]
FilterCorrelateRule on a Correlate with SemiJoinType SEMI (or ANTI) throws
IllegalStateException
URL: https://github.com/apache/calcite/pull/1112#discussion_r266773771
##########
File path:
core/src/main/java/org/apache/calcite/rel/rules/FilterCorrelateRule.java
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@@ -86,8 +86,10 @@ public void onMatch(RelOptRuleCall call) {
aboveFilters,
JoinRelType.INNER,
false,
- !corr.getJoinType().toJoinType().generatesNullsOnLeft(),
- !corr.getJoinType().toJoinType().generatesNullsOnRight(),
+ corr.getJoinType().returnsJustFirstInput()
+ || !corr.getJoinType().toJoinType().generatesNullsOnLeft(),
+ !corr.getJoinType().returnsJustFirstInput()
+ && !corr.getJoinType().toJoinType().generatesNullsOnRight(),
Review comment:
The idea is to avoid the `getJoinType().toJoinType()` call for SEMI and
ANTI, which can be differentiated because they both have
`getJoinType().returnsJustFirstInput() == true`
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